Back to results
US 2008/0073276 A1Published application
Filtering Systems and Methods Characterized by Reduced Color Throw
AssigneePentair Filtration Solutions, LLC
InventorsGary Hatch, Rajendra Mody, Michael Gottlieb, Carl Galletti
Life of this patent
Estimating the term…
Abstract
Disclosed are water treatment systems and methods that are characterized by reduced leaching of color-bearing material (i.e., color-bearing leachates) into effluent water. The disclosed systems and methods may include or utilize filtering systems comprising selected mixed ion-exchange resin beds of a strong acid sulfonated cation exchange resin and an anion exchange resin.
Claims26
A mixed bed ion exchange system comprising:
- (a) a strong acid sulfonated cation exchange resin;
- and
- (b) a strong base anion exchange resin;
- wherein the anion exchange resin represents about 5-20% of total resin in the mixed bed ion exchange system based on volume.
1 more element
A method for reducing color throw in a strong acid sulfonated cation resin exchange system, the method comprising:
- (a) combining the strong acid sulfonated cation resin and a strong base anion exchange resin to prepare a mixed resin bed ion exchange system, wherein the anion exchange resin represents about 5-20% of total resin in the mixed resin bed ion exchange system based on volume;
- (b) filtering water through the mixed resin bed ion exchange system, wherein the mixed resin bed ion exchange system exhibits reduced color throw in comparison to the strong acid sulfonated cation resin exchange system.
Dependencies are inferred from the claim text.